* To do [0/3]

- [ ] Package ~guile-fslib~ into a GNU Guix library.
- [ ] Unify module system. Either use R6RS libraries / modules or use Guile's module system.
- [ ] Find out whether implementing ~sub-fsing?~ as described in [[https://tools.ietf.org/html/rfc3986#section-5]] is necessary, when only dealing with file system locations.
